Charging in the cold
Discussion
I changed Taycan recently from RWD to a 4S ST and charged it at home for the first time this weekend (rarely charged my old one at home as cheaper to use IONITY.)
It seems very slow and wondering if this is because the temp here is at -2C. Assuming this is the same for everyone given that Battery temperature affects how the power is depleted so it seems common sense that it will affect the charge rate (hence preheating batteries for fast charging), I’m interested to know if there are any stats or articles on it.
It seems very slow and wondering if this is because the temp here is at -2C. Assuming this is the same for everyone given that Battery temperature affects how the power is depleted so it seems common sense that it will affect the charge rate (hence preheating batteries for fast charging), I’m interested to know if there are any stats or articles on it.
I mean it feels slow home charging compared to when my RWD was occasionally home charged. I appreciate the battery size is bigger on this (93kWh vs 73kWh. I noticed that the car was showing battery temp of 2C so assuming given I’m granny charging it cant put enough power in to warm the battery enough. We move home soon so I cant wait to change to an EV tariff with a proper supply so that I can benefit from home charging!
Home charging shouldn't be affected by temperature as the power (even 7kW) is so low. Completely different to 200kW+ charging where the battery needs lots of different conditions to be satisfied.
Are you using a "granny" charger or a wall box? Any way (e.g. smart meter or display in car) of seeing how many kW it is running at? If it's lower than it should be then it could be the car is set to reduced current AC charging.
You should be seeing about 2.4kW on a granny charger and 3.6/7.2 on a wall box depending if it's 16A or 32A.
Are you using a "granny" charger or a wall box? Any way (e.g. smart meter or display in car) of seeing how many kW it is running at? If it's lower than it should be then it could be the car is set to reduced current AC charging.
You should be seeing about 2.4kW on a granny charger and 3.6/7.2 on a wall box depending if it's 16A or 32A.
Big Nanas said:
This post is frustratingly short on details.
Have you got a home charge point? what speed is it?
Ionity gives speeds up to 350kwh, home charger speed is max 7kw/h.
Of course its going to be slower!
As far as I kn ow, temperature doest affect charging speed.
It also seems an odd thing to worry about unless it's so slow a car/charger fault is a possibility.Have you got a home charge point? what speed is it?
Ionity gives speeds up to 350kwh, home charger speed is max 7kw/h.
Of course its going to be slower!
As far as I kn ow, temperature doest affect charging speed.
I don't even know how long my car takes to charge fully, I'm drinking wine, eating dinner and then sleeping. Home charging is slow but the speed is also largely irrelevant..
OP, you need to work out how much the car charges in a set period of time, it should be around 10% less than the speed of the charger. If it's far lower then speak to the dealer.
ETA I expect there will be a very slight reduction on speed in the cold because the pack does have to warm for peak charging efficiency, but the power required to heat it a little even in sub zero temps is minimal compared to the power used to charge it.
Edited by TheDeuce on Sunday 11th December 20:26
Apologies I didn’t say the type in first post but did in my second; it’s granny charging ie 13A 3pin plug. Decided not to have a dedicated wall box installed as we had sold our house so no point until we move into the new house. It’s showing as 2.0kW but my old was 2.1kW. Definitely seems a lot slower that 2.0kW though, hence why I asked if other have noticed a change to their charging.
Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
W12GT said:
Apologies I didn’t say the type in first post but did in my second; it’s granny charging ie 13A 3pin plug. Decided not to have a dedicated wall box installed as we had sold our house so no point until we move into the new house. It’s showing as 2.0kW but my old was 2.1kW. Definitely seems a lot slower that 2.0kW though, hence why I asked if other have noticed a change to their charging.
Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
As I said above, there probably is a very slight drop due to temperature. You have dropped 0.1kwh which is a slight drop.Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
If the result of that charge equals far less range gained than you're used to, take it back to the dealer and get a battery health check. It's free.
2.1 or 2kW regardless is slow regardless what you think the difference is. Of course the charging is also pretty inefficient at these low currents so the cells will be getting nothing like 2kW and you have a 86kWh ish usable pack. Especially is the pack has a temperature system that wants the cells Atleast say 5C some electricity the granny unit is giving will just be to warm the pack.
W12GT said:
Apologies I didn’t say the type in first post but did in my second; it’s granny charging ie 13A 3pin plug. Decided not to have a dedicated wall box installed as we had sold our house so no point until we move into the new house. It’s showing as 2.0kW but my old was 2.1kW. Definitely seems a lot slower that 2.0kW though, hence why I asked if other have noticed a change to their charging.
Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
I take it you didn’t spec the Porsche mobile charger? If you’re just home charging from a 3 pin it will be slow, maybe your dealer could lend you a PMCC until you move house. I’ve installed a Zappi and have not noticed any change during this cold snap, though the range on my 4S has dropped somewhat. Some of the replies on here have taken me somewhat by surprise! You ask a simple honest question and PH does is thing……
I'm assumng this is just a case of a car with a bigger battery and poorer efficiency taking longer to add range. Something we definitely noticed when switching from a Model 3 to the etron, especially in the winter. We're only adding 4-5 miles per hour of charge at the minute via a granny charger at full power. 
SWoll said:
I'm assumng this is just a case of a car with a bigger battery and poorer efficiency taking longer to add range. Something we definitely noticed when switching from a Model 3 to the etron, especially in the winter. We're only adding 4-5 miles per hour of charge at the minute via a granny charger at full power.
Important to note that whilst charging speed may not be reduced (other than fractionally perhaps) by cold weather, but the lower efficiency of the car itself in the cold will show less miles per hour of charge.I suspect that's what's got the OP thinking there may be an issue or that cold weather really stunts charging times... If you were to judge charging time by looking at how many miles are added, it would give the impression of charging being 'slower' in the winter.
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